¡Eraser!

Intro Eraser appears to be a hot pink rubber school eraser in the shape of a narrow rhombohedron he has a smug expression on, he has black cartoony limbs he has black classic cartoon eyes and a cartoon smile, he has a smug expression on his face his catchphrase being "...which is?" Eraser is generally grumpy, bored, and impatient He can be quite arrogant making Pin believe he thinks that he is too cool to do anything Eraser is also shown to have some gluttonous traits he can also be sarcastic and self centered He often sticks with Pen and Blocky and can be critical others like when he calls Woody "annoying" or Golf Ball "bossy" Eraser is quick to voice his frustration as shown through his catchphrase "Which is?" However he can also be a reliable team player when necessary he is shown to be competitive He often sabotages other teams out of boredom like when he knocked over The Strongest Team on Earth's stacks in and acted smug about it Despite this he gradually becomes more helpful to his team starting in "The Seven Wonders of Goiky" when he revealed his sterner side in contrast to his laidback personality when telling Golf Ball she won't be of help in the challenge Eraser can be a bit more enthusiastic and helpful sometimes but it's rare and he usually still retains his grumpiness Eraser continues to build friendships like with Tennis Ball and TV and gradually plays a more helpful role in challenges Eraser also shows a more considerate side like when he tries to help Teardrop despite their past rivalry He is even shown to be on better terms with her in "Outbreak At Stake" showing that Eraser does care about others underneath his playful and sometimes cocky behavior he also has Pentaphobia the fear of Pentagons he also doesn't have a brain (ignore the voice💔)